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Log4j - Interview Questions and Answers for 'Debug vs trace' - 1 question(s) found
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Q1.
What is the difference between DEBUG and TRACE logging levels ?
Log4j
Ans. TRACE designates finer grained informational events than the DEBUG.TRACE is level lower than DEBUG.
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What is the difference between TimeBasedRollingPolicy and SizeBasedTriggeringPolicy within Log4j ? Can we use both together and What would that mean ?
What is the difference between RollingFile and RollingRandomAccessFile in log4j ?
In following log4j configuration file, How should we change the logging level to WARN
<Configuration status="DEBUG">
<Appenders>
<RollingFile name="File" fileName="logs/xyz.log" filePattern="logs/xyz-%d{MM-dd-yyyy}.log.gz">
<TimeBasedTriggeringPolicy />
</RollingFile>
</Appenders>
<Loggers>
<Root level="DEBUG">
<AppenderRef ref="File" />
</Root>
</Loggers>
</Configuration>
in the following log4j config file, How should we change the file name and format
<Configuration status="DEBUG">
<Appenders>
<RollingFile name="File" fileName="logs/xyz.log" filePattern="logs/xyz-%d{MM-dd-yyyy}.log.gz">
<TimeBasedTriggeringPolicy />
</RollingFile>
</Appenders>
<Loggers>
<Root level="DEBUG">
<AppenderRef ref="File" />
</Root>
</Loggers>
</Configuration>
In the following log4j config, What if we don't need rolling logs
<Configuration status="DEBUG">
<Appenders>
<RollingFile name="File" fileName="logs/xyz.log" filePattern="logs/xyz-%d{MM-dd-yyyy}.log.gz">
<TimeBasedTriggeringPolicy />
</RollingFile>
</Appenders>
<Loggers>
<Root level="DEBUG">
<AppenderRef ref="File" />
</Root>
</Loggers>
</Configuration>
What are some of the Log4j appenders ?
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